Power connecting device



Jul 192 y 19 7 P. H. DAVEY POWER coNNEcTING DEVICE Filed June 2l. 1926 25x/4f' .XA

Patented July 19, 1927.

PAUL n. havnt, or uur,

rom comerme navma.l 5 i Application mea mi.' ai., me. semi in. 111,649.

This invention relates to power connecting devices, and is shown herein as being applied to an air com ressor mounted on the front of an automo ile vehicle, although the invention has numerous other applica-1 tions.

The driving of an air compressor or other ower consuming device from an engine is kely to cause many practical ydiiliculties, and this is particularly true where a power connection is to be made tothe en ine of an automotive vehicle. I have foun from exi. haustive testsvthat unless some flexible and yieldable means are provided in the driving connection between the automobile engine and an air compressor driven thereby, the drive shaft will break sooner or later. It

is 4also necessary to provide a connectionl in the nature of a clutch connection so that the power consuming devicel may be connected or disconnected from the engine at will. v

I therefore provide a driving connection wherein the driving andthe driven shafts vare placed in substantially-coaxial relationship and mount a Adrum member on each of these shafts.. I further provide a bodily re- -movable clamping band adapted to Vsurround the drum members,l so as to operatively connect theshafts. Preferably one of the drum members isilexibly connected to its shaft and this is most conveniently done by attachin a spider tothe shaft, con? necting a yielda le disk, made of layers of fabric impregnated by rubber, to the spider and then attachin the drum member proper to this yieldable 'sk.

The abovedescribed arrangement is efl fective for removing a large number of the shocks incident to the driving of an a paratus such as an air compressor. hese v shocks may be further reduced by ,so formin one of the drum members that it acts asV a ywheel. This flywheel may also be used as a driving pulley for operatin which is preferably employed wit an air compressor, or it may be used for driving otherdevices. ,v i.

In the accompanying vdrawings which i1- lusti'ate the present preferred embodiment of my invention as a plied to the driving of an air compressor rom the 'engine of anr automotive vehicle,

Figure 1 is a vertical section through an air compressor, and the front portion of an a vfanl omo, Assioma or omi-xm vro :ma L a. nam, or sounn man, eoxmio'rrcu'n- Y automotive vehicle, showing my driving connection; and

Fi ure 2 is a vertical section ltakenoii the line I-II of Figure 1.

In the illustrated embodiment of my invention, there is shown an air compressor indicated generally by the reference character 2, which is mounted on extension members. 3 secured in the frame F of an automotive vehicle. The radiator R of the vehicle is indicated in chain lines.

The air compressor comprises a pair of opposed cylinders 4 having pistons and connecting rods which are operatively connected to a crank 5 on a shaft 6. The coinpressor is provided with a frame member 7 which is connected to extension members 3 and so designed as to bring the shaft 6 into substantial alignment with the forward extension 8 of the crank shaft of the automobile engine (not shown).

vInstead of the hand crank attachment which is usually secured to the end of the crank shaft 8, I rovide a. shaft extension 9 which is secure to the crank shaft in a suitable manner and projects through the opening generally placed below the radiator proper, and through the radiator shell, for accommodating the hand crank.

The shaft 9 is rovided with a tapering portion 10 at its ront end and a spider 11 is secured to this ltapering portion by a key 12 and a nut 13. p 4

Bolts 14 are provided in each arm of the s ider 11 and these bolts pass through a exible disk 15. The disk 15 is preferably made of a number of layers of` fabric ini-4 pregnated with rubber.

A rim member 16 is alsosecuredto the,` flexible Adisk 15. For purposes of connecej tion it is provided with lugs 17 which are secured to the disk by bolts 18, and as best shown in Figure 2, the lugs 17 lie inter-` mediate tlie arms of the spider 11.

The shaft 6 is provided with a tapered 10" portion over which is fitted a drum member 19, the Adrum member being secured by a key and nut as shown. Preferably the shaft 6 is also provided with an extension 20 whichl fits into a ball bearing 21 mounted in the 105 spider 11.

In order to secure the drum members togather I provide a bodily removable clamping band. This band preferably comprises a plurality of arcuate sections 22 secured tou' gether by hinge members 23. The sections 22 are preferably somewhat flexible and are provided with a suitable lining 24 having a certain amount of yieldability. Brake band lining has been found very satisfactory.

The free ends of the clamping band are provided with members 25 and`26 for suitably clamping the band around the drum members.` The member 25 carries a bolt 27 which is hinged on a pin 28, and the member 26 is provided with a slot 29 into which the bolt may fit. A nut and washer 31 are also provided. .When the automotive vehicle is being moved from place to place the clamping band is bodily removed. When it is desired to operate the air compressor, the clam ing band is placed around the drum mem ers, the hinge bolt 27 is placed in the slot 29 and the nut 30 is tightened until the outer faces of the drum members are firmly gripped. The compressor may then be operated indefinitely. It is found that the above described arrangement is highly satisfactory in practice. Twisting or weaving of the frame F does not disturb the connection and the device may be operated for hours at a time without interruption. A flange 32 is provided on therim member 16 for preventing the band from working off in operation. The clearance between the drum members permits of a certain amount of misalignment without inpury and the bearing 21 is preferably of such type that it Will not bind, if by any chance the shafts 6 and do get slightly out of alignment.

The drum member 19 is provided with a rim 33 which acts as a flywheel and thus aids in reducing the shock load on the drive shaft. If desired, the outer face of this rim may be crowned to accommodate a. drive belt 34 for operating a cooling fan 35 adapted to supply a blast of air through the radiator R and thus keep the engine cool.

I have illustrated and described a preferred form of my invention, but it will be understood that it will not be limited to this form, as it may be otherwise embodied within the scope of the following claims:

I claim l. The combination of a driving shaft, a drven shaft normally alined therewith, a flexible torque-cushioning disk permitting limited misalinement of said shafts, separate drums on said shafts, and a clampin band adapted to encircle said drumssai band tending to correct any misalinement of said drums and being movable out of operating contact with3 said drums.

2. In a driving connection for use in a gas compressor drive having a compressor shaft and an engine shaft normally alined .being of resilient material a. flexible torque-cushioning coupling between one of. the drums and its shaft.

A driving connection, comprising a driving shaft, a driven shaft, a pair of drum members connected to the shafts and a bodl ily removable clamping band adapted to surround the drum members and thus connect the shafts, one of the drum members comprising a spider attached to the shaft, a rim member and a ieldable connecting disk attached to the spi er and the rim members.

4. In a driving connection for use in a gas compressor drive having a compressor shaft and an engine shaft normally alined with said compressor shaft, the combination with separate drums on said shafts of a bodily removable band adapted to encircle said drums for clampin them together, and a flexible disk of resilient material arranged to permit limited misalinement of said sha ts.

5. In a driving connection for use in a gas compressor drive including an engine shaft and a compressor shaft normally alined with `said engine shaft, the combination with separate drums on said shafts of a bodily removable band adapted to encircle said drums for clamping them together and a yieldable coupling arranged to permit limited misalinement of said shafts.

6. The combination of a driving shaft, a driven shaft normally alined therewith, a flexible coupling permitting limited misalinement of said shafts, separate drums on said shafts, and a bodily removable clamping band adapted to encircle said drums said band tending to correct any misalinement of said drums.

7. The combination of a driving shaft, a driven shaft normally alined therewith, a flexible disk coupling permitting limited misalinement of said shafts, separate drums on said shafts, and a bodily removable clamping band adapted to encircle said drums said band tending to correct any mis'- alinement of said drums.

8. A device as in claim 7, the flexible disk the torque of the drive.

, In testimony whereof I have hereunto set my hand.

v PAUL H. DAVEY.

for cushioning 

